Wiring up a aftermarket rear view camera

[spike47]

Hi
Re: 2011 Tiguan FWD.
Am going try and fit a aftermarket wi-fi rear view camera, question, behind the RHS panel in the boot is a loom of 3 wires which I beleive are the wires to the reverse lights, 1-Brown, 1-Blue/Black,1-Blue/Black.
Now which one do I take for the feed to my camera (via a relay).
and where do I fit the feed to the infotainment unit, tried to find pics of the rear connections to the unit but no luck up to now, have ordered a connector as per pic, just because was told that is what I need !.

cheers
Spike